391 lines
8.8 KiB
Lua
391 lines
8.8 KiB
Lua
-- localize math functions
|
|
local math = math
|
|
local HALF_PI = math.pi / 2
|
|
local DOUBLE_PI = math.pi * 2
|
|
|
|
-- localize vector functions
|
|
local vector = vector
|
|
|
|
local minetest_yaw_to_dir = minetest.yaw_to_dir
|
|
local minetest_dir_to_yaw = minetest.dir_to_yaw
|
|
|
|
local DEFAULT_JUMP_HEIGHT = 5
|
|
local DEFAULT_FLOAT_SPEED = 4
|
|
local DEFAULT_CLIMB_SPEED = 3
|
|
|
|
mobs.stick_in_cobweb = function(self)
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = vector.multiply(vector.normalize(current_velocity), 0.4)
|
|
|
|
goal_velocity.y = -0.5
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
--this is a generic float function
|
|
mobs.float = function(self)
|
|
|
|
local acceleration = self.object:get_acceleration()
|
|
|
|
if not acceleration then
|
|
return
|
|
end
|
|
|
|
if acceleration.y ~= 0 then
|
|
self.object:set_acceleration({x=0, y=0, z=0})
|
|
end
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = 0,
|
|
y = DEFAULT_FLOAT_SPEED,
|
|
z = 0,
|
|
}
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity, current_velocity)
|
|
|
|
new_velocity_addition.x = 0
|
|
new_velocity_addition.z = 0
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
--this is a generic climb function
|
|
mobs.climb = function(self)
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = 0,
|
|
y = DEFAULT_CLIMB_SPEED,
|
|
z = 0,
|
|
}
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
new_velocity_addition.x = 0
|
|
new_velocity_addition.z = 0
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
|
|
|
|
--[[
|
|
_ _
|
|
| | | |
|
|
| | __ _ _ __ __| |
|
|
| | / _` | '_ \ / _` |
|
|
| |___| (_| | | | | (_| |
|
|
\_____/\__,_|_| |_|\__,_|
|
|
]]
|
|
|
|
|
|
-- move mob in facing direction
|
|
--this has been modified to be internal
|
|
--internal = lua (self.yaw)
|
|
--engine = c++ (self.object:get_yaw())
|
|
mobs.set_velocity = function(self, v)
|
|
|
|
local yaw = (self.yaw or 0)
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = (math.sin(yaw) * -v),
|
|
y = 0,
|
|
z = (math.cos(yaw) * v),
|
|
}
|
|
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
if vector.length(new_velocity_addition) > vector.length(goal_velocity) then
|
|
vector.multiply(new_velocity_addition, (vector.length(goal_velocity) / vector.length(new_velocity_addition)))
|
|
end
|
|
|
|
new_velocity_addition.y = 0
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
|
|
|
|
-- calculate mob velocity
|
|
mobs.get_velocity = function(self)
|
|
|
|
local v = self.object:get_velocity()
|
|
|
|
v.y = 0
|
|
|
|
if v then
|
|
return vector.length(v)
|
|
end
|
|
|
|
return 0
|
|
end
|
|
|
|
--make mobs jump
|
|
mobs.jump = function(self, velocity)
|
|
|
|
if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
|
|
return
|
|
end
|
|
|
|
--fallback velocity to allow modularity
|
|
velocity = velocity or DEFAULT_JUMP_HEIGHT
|
|
|
|
self.object:add_velocity(vector.new(0,velocity,0))
|
|
end
|
|
|
|
--make mobs fall slowly
|
|
mobs.mob_fall_slow = function(self)
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = 0,
|
|
y = -2,
|
|
z = 0,
|
|
}
|
|
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
new_velocity_addition.x = 0
|
|
new_velocity_addition.z = 0
|
|
|
|
if vector.length(new_velocity_addition) > vector.length(goal_velocity) then
|
|
vector.multiply(new_velocity_addition, (vector.length(goal_velocity) / vector.length(new_velocity_addition)))
|
|
end
|
|
|
|
new_velocity_addition.x = 0
|
|
new_velocity_addition.z = 0
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
|
|
end
|
|
|
|
|
|
--[[
|
|
_____ _
|
|
/ ___| (_)
|
|
\ `--.__ ___ _ __ ___
|
|
`--. \ \ /\ / / | '_ ` _ \
|
|
/\__/ /\ V V /| | | | | | |
|
|
\____/ \_/\_/ |_|_| |_| |_|
|
|
]]--
|
|
|
|
|
|
|
|
|
|
--make mobs flop
|
|
mobs.flop = function(self, velocity)
|
|
|
|
if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
|
|
return false
|
|
end
|
|
|
|
mobs.set_velocity(self, 0)
|
|
|
|
--fallback velocity to allow modularity
|
|
velocity = velocity or DEFAULT_JUMP_HEIGHT
|
|
|
|
--create a random direction (2d yaw)
|
|
local dir = DOUBLE_PI * math.random()
|
|
|
|
--create a random force value
|
|
local force = math.random(0,3) + math.random()
|
|
|
|
--convert the yaw to a direction vector then multiply it times the force
|
|
local final_additional_force = vector.multiply(minetest_yaw_to_dir(dir), force)
|
|
|
|
--place in the "flop" velocity to make the mob flop
|
|
final_additional_force.y = velocity
|
|
|
|
self.object:add_velocity(final_additional_force)
|
|
|
|
return true
|
|
end
|
|
|
|
|
|
|
|
-- move mob in facing direction
|
|
--this has been modified to be internal
|
|
--internal = lua (self.yaw)
|
|
--engine = c++ (self.object:get_yaw())
|
|
mobs.set_swim_velocity = function(self, v)
|
|
|
|
local yaw = (self.yaw or 0)
|
|
local pitch = (self.pitch or 0)
|
|
|
|
if v == 0 then
|
|
pitch = 0
|
|
end
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = (math.sin(yaw) * -v),
|
|
y = pitch,
|
|
z = (math.cos(yaw) * v),
|
|
}
|
|
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
if vector.length(new_velocity_addition) > vector.length(goal_velocity) then
|
|
vector.multiply(new_velocity_addition, (vector.length(goal_velocity) / vector.length(new_velocity_addition)))
|
|
end
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
--[[
|
|
______ _
|
|
| ___| |
|
|
| |_ | |_ _
|
|
| _| | | | | |
|
|
| | | | |_| |
|
|
\_| |_|\__, |
|
|
__/ |
|
|
|___/
|
|
]]--
|
|
|
|
-- move mob in facing direction
|
|
--this has been modified to be internal
|
|
--internal = lua (self.yaw)
|
|
--engine = c++ (self.object:get_yaw())
|
|
mobs.set_fly_velocity = function(self, v)
|
|
|
|
local yaw = (self.yaw or 0)
|
|
local pitch = (self.pitch or 0)
|
|
|
|
if v == 0 then
|
|
pitch = 0
|
|
end
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = (math.sin(yaw) * -v),
|
|
y = pitch,
|
|
z = (math.cos(yaw) * v),
|
|
}
|
|
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
if vector.length(new_velocity_addition) > vector.length(goal_velocity) then
|
|
vector.multiply(new_velocity_addition, (vector.length(goal_velocity) / vector.length(new_velocity_addition)))
|
|
end
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
--a quick and simple pitch calculation between two vector positions
|
|
mobs.calculate_pitch = function(pos1, pos2)
|
|
|
|
if pos1 == nil or pos2 == nil then
|
|
return false
|
|
end
|
|
|
|
return minetest_dir_to_yaw(vector.new(vector.distance(vector.new(pos1.x,0,pos1.z),vector.new(pos2.x,0,pos2.z)),0,pos1.y - pos2.y)) + HALF_PI
|
|
end
|
|
|
|
--make mobs fly up or down based on their y difference
|
|
mobs.set_pitch_while_attacking = function(self)
|
|
local pos1 = self.object:get_pos()
|
|
local pos2 = self.attacking:get_pos()
|
|
|
|
local pitch = mobs.calculate_pitch(pos2,pos1)
|
|
|
|
self.pitch = pitch
|
|
end
|
|
|
|
|
|
|
|
--[[
|
|
___
|
|
|_ |
|
|
| |_ _ _ __ ___ _ __
|
|
| | | | | '_ ` _ \| '_ \
|
|
/\__/ / |_| | | | | | | |_) |
|
|
\____/ \__,_|_| |_| |_| .__/
|
|
| |
|
|
|_|
|
|
]]--
|
|
|
|
--special mob jump movement
|
|
mobs.jump_move = function(self, velocity)
|
|
|
|
if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
|
|
return
|
|
end
|
|
|
|
--make the mob stick for a split second
|
|
mobs.set_velocity(self,0)
|
|
|
|
--fallback velocity to allow modularity
|
|
local jump_height = DEFAULT_JUMP_HEIGHT
|
|
|
|
local yaw = (self.yaw or 0)
|
|
|
|
local current_velocity = self.object:get_velocity()
|
|
|
|
local goal_velocity = {
|
|
x = (math.sin(yaw) * -velocity),
|
|
y = jump_height,
|
|
z = (math.cos(yaw) * velocity),
|
|
}
|
|
|
|
|
|
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
|
|
|
|
if vector.length(new_velocity_addition) > vector.length(goal_velocity) then
|
|
vector.multiply(new_velocity_addition, (vector.length(goal_velocity) / vector.length(new_velocity_addition)))
|
|
end
|
|
|
|
--smooths out mobs a bit
|
|
if vector.length(new_velocity_addition) >= 0.0001 then
|
|
self.object:add_velocity(new_velocity_addition)
|
|
end
|
|
end
|
|
|
|
--make it so mobs do not glitch out and freak out
|
|
--when moving around over nodes
|
|
mobs.swap_auto_step_height_adjust = function(self)
|
|
local y_vel = self.object:get_velocity().y
|
|
|
|
if y_vel == 0 and self.stepheight ~= self.stepheight_backup then
|
|
self.stepheight = self.stepheight_backup
|
|
elseif y_vel ~= 0 and self.stepheight ~= 0 then
|
|
self.stepheight = 0
|
|
end
|
|
end
|